Help need using pastry knife attachment

Help need using pastry knife attachment

i have bought a hobart 30qt mixer and have ordered a pastry knife attachment to suit.

we currently make use of a large mixer with a fixed dough hook to make our shortcrust. As this is not suitable we purchased the above.

i need assistance from anybody who uses a large mixer utilising a pastry knife in regards to the speed used etc when cutting the fat/flour also when incorporating the liquid. Also the benefits of shortening vs butter ( or combination)

If so, then you would usually use second speed on a Hobart mixer and mix flour and fat until it forms a crumb. So get rid of any lumps of fat, but do not allow the mass to form any sort of dough. Shortening has no water content and is specifically designed to make tender shortcrust pastry. Butter has water content of c. 15-20% which has a bearing on toughening in the finished paste if you mix it too much. But, the flavour is way better; it also costs a lot more too.

Regarding mixing, the real key is not to crumbing, but once you add the water. At this point you need to keep mixing to a minimum, and use first speed only to avoid any toughening in the paste. It would be good practice to chill and rest the paste post mixing.

Can you give me a link so I can view it online without having to download it please? But, I should warn you that the paddle beater I showed you is the only attachment I have direct experience of using to make paste on an upright machine. If you have something different, I might not be able to help further.

I don't understand the difference in your descriptions of crumbed fat/flour. I've been as precise as I can on the end of a pc. You appear to be over-complicating things.

If you add vinegar it will strengthen the gluten. It depends how much pliability you require in the paste. The best eating paste is the most difficult to work with as it is "short". I don't add any acid, and instead adjust the mixing to suit the paste. Sheeted paste might need a little more mixing for instance. The savoury paste you are working with will most likely be sheeted. But, the more mixing, the tougher the paste, and subsequent reduction in shortness regarding the mouthfeel of the paste when eaten. Be sure to keep the liquid cold when added to the crumb.

Regarding acid, it is more common to add a relaxant to paste. Acid may achieve more of the opposite effect, in that it tightens up the gluten.

A more effective additive is probably something like L-Cysteine, even a touch of Sodium Metabishulphite. But if you use these, added quantity is 75 parts per million on flour maximum...and I doubt you would be able to weigh that out accurately at your workplace. Any overdosing is of course fatal, and the paste will fall to pieces.

My preference is to use other means....look at the strength of your flour, your mixing times, and the amount of resting time before you process further. Also key is your choice of fat level in the formula, of course

Would it help if you mixed the paste for the tarts separately? If the paste is too fragile for these products, could you try reducing the fat level? Say 40 - 45% on flour?

Shrinkage is best avoided by working with paste that is fully relaxed.

I'm looking at your formula and thinking the paste must be a high cost item for your business. For a shortcrust formula for quiche, I would use 100% plain flour, 50% shortening, 1% salt and 25% water. That may not produce the type of paste you are looking for, so just ignore this if you are happy with your current formula. But 15% liquid in a savoury paste is asking quite a lot in terms of performance. And butter plus egg is very costly compared to water and shortening.

Acid in bread helps firms gluten strands- yes. But acid (like cider vinegar) added to pastry doughs actually helps relax the gluten (make it more extensible) without weakening it, which can be very desireable for pastry that will be rolled, like flaky crust (pate brisee). It isn't necessary for a pate sucree that you are pressing into the pan. Even if you are rolling the pate sucree, the sugar in it should help provide tenderness and so vinegar isn't normally included. I know this to be true, both from my own test baking/recipe development and from the writings of experts, but am at a loss to explain it. Any explanations, comments, musings are most welcome :)

Agree with Andy that your formula has a lot of liquid, which can make a pastry crust tough, both because it will form more gluten and because it will require more flour during rolling. Is the reason you have so much liquid because your flour has a protein content that is too high? Anything much over 9% protein in the flour is likely to produce a tough crust unless you really work hard to counteract it with extra fat, a dry dough, minimal handling, long refrigerated rest, etc.

This is savoury paste. So I was suggesting that liquid levels are too low in Aaron's formula, not too high!

Maybe I'm just being a cheap skate? But sheeting savoury paste will be challenging if liquid is low and flour is very weak as well. Maybe blocking for all products would be more effective; then some could be made with hot water to try to de-nature some protein and confer shortness that way?

Sorry, Andy, hope I didn't complicate matters! I was thinking of a savory pastry crust as an unsweetened flaky crust, which I would use for both sweet and savory fillings. But upon re-reading I realize that you may be talking about something more like a savory cookie crust, with no flakiness intended. Will read more carefully next time :)

I have very similar set up. We mix all our flour salt shortening mixture let it set in cooler and add cold water, form and press into shells tins. I just got my pastry cutter for our hobart, and was wondering how yours turned out. Any tricks and or no nos would be greatly appreciated! Can you go straight from the crumb stage to the paste and straight to the press or do you have to have the setting stage in the cooler, and do you notice any difference using the pastry cutter vs. just a plain old paddle on the mixer?

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